/*
*  Ajax Autocomplete for jQuery, version 1.0.6
*  (c) 2009 Tomas Kirda
*
*  Ajax Autocomplete for jQuery is freely distributable under the terms of an MIT-style license.
*  For details, see the web site: http://www.devbridge.com/projects/autocomplete/jquery/
*
*  Last Review: 4/24/2009
*/
 (function($) {
    $.fn.autocomplete = function(options) {
        return this.each(function() {
            return new Autocomplete(this, options);
        });
    };
    var reEscape = new RegExp("(\\" + ["/", ".", "*", "+", "?", "|", "(", ")", "[", "]", "{", "}", "\\"].join("|\\") + ")", "g");
    var fnFormatResult = function(value, data, currentValue) {
        var pattern = "(" + currentValue.replace(reEscape, "\\$1") + ")";
        return value.replace(new RegExp(pattern, "gi"), "<strong>$1</strong>");
    };
    var Autocomplete = function(el, options) {
        this.el = $(el);
        this.el.attr("autocomplete", "off");
        this.suggestions = [];
        this.data = [];
        this.badQueries = [];
        this.selectedIndex = -1;
        this.currentValue = this.el.val();
        this.intervalId = 0;
        this.cachedResponse = [];
        this.onChangeInterval = null;
        this.ignoreValueChange = false;
        this.serviceUrl = options.serviceUrl;
        this.isLocal = false;
        this.options = {
            autoSubmit: false,
            minChars: 1,
            maxHeight: 300,
            deferRequestBy: 0,
            width: 0,
            highlight: true,
            params: {'type_id': this.el.siblings('#type_id').val() },
            fnFormatResult: fnFormatResult,
            delimiter: null
        };
        if (options) {
            $.extend(this.options, options);
        }
        if (this.options.lookup) {
            this.isLocal = true;
            if ($.isArray(this.options.lookup)) {
                this.options.lookup = {
                    suggestions: this.options.lookup,
                    data: []
                };
            }
        }
        this.initialize();
    };
    Autocomplete.prototype = {
        killerFn: null,
        initialize: function() {
            var me,
            zindex;
            me = this;
            zindex = Math.max.apply(null, $.map($("body > *"),
            function(e, n) {
                var pos = $(e).css("position");
                if (pos === "absolute" || pos === "relative") {
                    return parseInt($(e).css("z-index"), 10) || 1;
                }
            }));
            this.killerFn = function(e) {
                if ($(e.target).parents(".autocomplete").size() === 0) {
                    me.killSuggestions();
                    me.disableKillerFn();
                }
            };
            var uid = new Date().getTime();
            var autocompleteElId = "Autocomplete_" + uid;
            if (!this.options.width) {
                this.options.width = this.el.width();
            }
            this.mainContainerId = "AutocompleteContainter_" + uid;
            $('<div id="' + this.mainContainerId + '" style="position:absolute;z-index:' + zindex + '"><div class="autocomplete-w1"><div class="autocomplete" id="' + autocompleteElId + '" style="display:none; width:' + this.options.width + 'px;"></div></div></div>').appendTo("body");
            this.container = $("#" + autocompleteElId);
            this.fixPosition();
            if (window.opera) {
                this.el.keypress(function(e) {
                    me.onKeyPress(e);
                });
            } else {
                this.el.keydown(function(e) {
                    me.onKeyPress(e);
                });
            }
            this.el.keyup(function(e) {
                me.onKeyUp(e);
            });
            this.el.blur(function() {
                me.enableKillerFn();
            });
            this.el.focus(function() {
                me.fixPosition();
            });
            this.container.css({
                maxHeight: this.options.maxHeight + "px"
            });
        },
        fixPosition: function() {
            var offset = this.el.offset();
            $("#" + this.mainContainerId).css({
                top: (offset.top + this.el.innerHeight()) + "px",
                left: offset.left + "px"
            });
        },
        enableKillerFn: function() {
            var me = this;
            $(document).bind("click", me.killerFn);
        },
        disableKillerFn: function() {
            var me = this;
            $(document).unbind("click", me.killerFn);
        },
        killSuggestions: function() {
            var me = this;
            this.stopKillSuggestions();
            this.intervalId = window.setInterval(function() {
                me.hide();
                me.stopKillSuggestions();
            },
            300);
        },
        stopKillSuggestions: function() {
            window.clearInterval(this.intervalId);
        },
        onKeyPress: function(e) {
            if (!this.enabled) {
                return;
            }
            switch (e.keyCode) {
            case 27:
                this.el.val(this.currentValue);
                this.hide();
                break;
            case 9:
            case 13:
                if (this.selectedIndex === -1) {
                    this.hide();
                    return;
                }
                this.select(this.selectedIndex);
                if (e.keyCode === 9) {
                    return;
                }
                break;
            case 38:
                this.moveUp();
                break;
            case 40:
                this.moveDown();
                break;
            default:
                return;
            }
            e.stopImmediatePropagation();
            e.preventDefault();
        },
        onKeyUp: function(e) {
            switch (e.keyCode) {
            case 38:
            case 40:
                return;
            }
            clearInterval(this.onChangeInterval);
            if (this.currentValue !== this.el.val()) {
                if (this.options.deferRequestBy > 0) {
                    var me = this;
                    this.onChangeInterval = setInterval(function() {
                        me.onValueChange();
                    },
                    this.options.deferRequestBy);
                } else {
                    this.onValueChange();
                }
            }
        },
        onValueChange: function() {
            clearInterval(this.onChangeInterval);
            this.currentValue = this.el.val();
            var q = this.getQuery(this.currentValue);
            this.selectedIndex = -1;
            if (this.ignoreValueChange) {
                this.ignoreValueChange = false;
                return;
            }
            if (q === "" || q.length < this.options.minChars) {
                this.hide();
            } else {
                this.getSuggestions(q);
            }
        },
        getQuery: function(val) {
            var d,
            arr;
            d = this.options.delimiter;
            if (!d) {
                return $.trim(val);
            }
            arr = val.split(d);
            return $.trim(arr[arr.length - 1]);
        },
        getSuggestionsLocal: function(q) {
            var ret,
            arr,
            len,
            val;
            arr = this.options.lookup;
            len = arr.suggestions.length;
            ret = {
                suggestions: [],
                data: []
            };
            for (var i = 0; i < len; i++) {
                val = arr.suggestions[i];
                if (val.toLowerCase().indexOf(q.toLowerCase()) === 0) {
                    ret.suggestions.push(val);
                    ret.data.push(arr.data[i]);
                }
            }
            return ret;
        },
        getSuggestions: function(q) {
            var cr,
            me,
            ls;
            cr = this.isLocal ? this.getSuggestionsLocal(q) : this.cachedResponse[q];
            if (cr && $.isArray(cr.suggestions)) {
                this.suggestions = cr.suggestions;
                this.data = cr.data;
                this.suggest();
            } else {
                if (!this.isBadQuery(q)) {
                    me = this;
                    me.options.params.query = q;
                    $.get(this.serviceUrl, me.options.params,
                    function(txt) {
                        me.processResponse(txt);
                    },
                    "text");
                }
            }
        },
        isBadQuery: function(q) {
            var i = this.badQueries.length;
            while (i--) {
                if (q.indexOf(this.badQueries[i]) === 0) {
                    return true;
                }
            }
            return false;
        },
        hide: function() {
            this.enabled = false;
            this.selectedIndex = -1;
            this.container.hide();
        },
        suggest: function() {
            if (this.suggestions.length === 0) {
                this.hide();
                return;
            }
            var me,
            len,
            div,
            f;
            me = this;
            len = this.suggestions.length;
            f = this.options.fnFormatResult;
            v = this.getQuery(this.currentValue);
            this.container.hide().empty();
            for (var i = 0; i < len; i++) {
                div = $((me.selectedIndex === i ? '<div class="selected"': "<div") + ' title="' + this.suggestions[i] + '">' + f(this.suggestions[i], this.data[i], v) + "</div>");
                div.mouseover((function(xi) {
                    return function() {
                        me.activate(xi);
                    };
                })(i));
                div.click((function(xi) {
                    return function() {
                        me.select(xi);
                    };
                })(i));
                this.container.append(div);
            }
            this.enabled = true;
            this.container.show();
        },
        processResponse: function(text) {
            var response;
            try {
                response = eval("(" + text + ")");
            } catch(err) {
                return;
            }
            if (!$.isArray(response.data)) {
                response.data = [];
            }
            this.suggestions = response.suggestions;
            this.data = response.data;
            this.cachedResponse[response.query] = response;
            if (response.suggestions.length === 0) {
                this.badQueries.push(response.query);
            }
            if (response.query === this.getQuery(this.currentValue)) {
                this.suggest();
            }
        },
        activate: function(index) {
            var divs = this.container.children();
            var activeItem;
            if (this.selectedIndex !== -1 && divs.length > this.selectedIndex) {
                $(divs.get(this.selectedIndex)).attr("class", "");
            }
            this.selectedIndex = index;
            if (this.selectedIndex !== -1 && divs.length > this.selectedIndex) {
                activeItem = divs.get(this.selectedIndex);
                $(activeItem).attr("class", "selected");
            }
            return activeItem;
        },
        deactivate: function(div, index) {
            div.className = "";
            if (this.selectedIndex === index) {
                this.selectedIndex = -1;
            }
        },
        select: function(i) {
            var selectedValue = this.suggestions[i];
            if (selectedValue) {
                this.el.val(selectedValue);
                if (this.options.autoSubmit) {
                    var f = this.el.parents("form");
                    if (f.length > 0) {
                        f.get(0).submit();
                    }
                }
                this.ignoreValueChange = true;
                this.hide();
                this.onSelect(i);
            }
        },
        moveUp: function() {
            if (this.selectedIndex === -1) {
                return;
            }
            if (this.selectedIndex === 0) {
                this.container.children().get(0).className = "";
                this.selectedIndex = -1;
                this.el.val(this.currentValue);
                return;
            }
            this.adjustScroll(this.selectedIndex - 1);
        },
        moveDown: function() {
            if (this.selectedIndex === (this.suggestions.length - 1)) {
                return;
            }
            this.adjustScroll(this.selectedIndex + 1);
        },
        adjustScroll: function(i) {
            var activeItem,
            offsetTop,
            upperBound,
            lowerBound;
            activeItem = this.activate(i);
            offsetTop = activeItem.offsetTop;
            upperBound = this.container.scrollTop();
            lowerBound = upperBound + this.options.maxHeight - 25;
            if (offsetTop < upperBound) {
                this.container.scrollTop(offsetTop);
            } else {
                if (offsetTop > lowerBound) {
                    this.container.scrollTop(offsetTop - this.options.maxHeight + 25);
                }
            }
        },
        onSelect: function(i) {
            var me,
            onSelect,
            getValue,
            s,
            d;
            me = this;
            onSelect = me.options.onSelect;
            getValue = function(value) {
                var del,
                currVal;
                del = me.options.delimiter;
                currVal = me.currentValue;
                if (!del) {
                    return value;
                }
                var arr = currVal.split(del);
                if (arr.length === 1) {
                    return value;
                }
                return currVal.substr(0, currVal.length - arr[arr.length - 1].length) + value;
            };
            s = me.suggestions[i];
            d = me.data[i];
            me.el.val(getValue(s));
            if ($.isFunction(onSelect)) {
                onSelect(s, d, me.el);
            }
        }
    };
})(jQuery);